tests/org.eclipse.ui.tests/Eclipse JFace Tests/org/eclipse/jface/tests/images/ImageRegistryTest.java

/*******************************************************************************
 * Copyright (c) 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jface.tests.images;

import junit.framework.TestCase;

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IconAndMessageDialog;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.graphics.Image;

/**
 * @since 3.0
 */
public class ImageRegistryTest extends TestCase {
    public ImageRegistryTest(String name) {
        super(name);
    }

    public static void main(String args[]) {
        junit.textui.TestRunner.run(ImageRegistryTest.class);
    }

    public void testGetNull() {
        ImageRegistry reg = JFaceResources.getImageRegistry();

        Image result = reg.get((String) null);
        assertTrue("Registry should handle null", result == null);
    }

    public void testGetString() {

        // note, we must touch the class to ensure the static initialer runs
        // so the image registry is up to date
        Class clazz = Dialog.class;

        String[] imageNames = new String[] { Dialog.DLG_IMG_ERROR,
                Dialog.DLG_IMG_INFO, Dialog.DLG_IMG_QUESTION,
                Dialog.DLG_IMG_WARNING, Dialog.DLG_IMG_MESSAGE_ERROR,
                Dialog.DLG_IMG_MESSAGE_INFO, Dialog.DLG_IMG_MESSAGE_WARNING };

        ImageRegistry reg = JFaceResources.getImageRegistry();

        for (int i = 0; i < imageNames.length; i++) {
            String imageName = imageNames[i];
            Image image1 = reg.get(imageName);
            assertTrue("Returned null image", image1 != null);
        }

    }

    /**
     * check that we get non-null versions of the <code>IconAndMessageDialog</code> images
     * so we know that the code using them can rely on them.
     * 
     * Note that they can be <code>null</code> from SWT.
     *
     */
    public void testGetIconMessageDialogImages() {

        IconAndMessageDialog iconDialog = new MessageDialog(null,
                "testGetDialogIcons", null, "Message", Window.CANCEL,
                new String[] { "cancel" }, 0);

        Image[] images = new Image[] { iconDialog.getErrorImage(),
                iconDialog.getInfoImage(), iconDialog.getQuestionImage(),
                iconDialog.getWarningImage() };

        for (int i = 0; i < images.length; i++) {
            assertTrue("Returned null image", images[i] != null);
        }

    }
}